A flash flood warning is in effect for parts of Middle Tennessee, including Nashville, Lebanon, Franklin and Hendersonville as more rain Tuesday and Wednesday adds to saturated grounds throughout the region.

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Cars sit in the flooded parking lot of the Brentwood Family YMCA on Concord Road in Brentwood Wednesday, Feb. 20, 2019, after days of rain have hit Middle Tennessee.(Photo: Shelley Mays / The Tennessean)

The warnings has been extended until 1:30 p.m. and includes Davidson, Sumner, Williamson, Rutherford, Wilson, Maury and Cannon counties, the National Weather Service in Nashville said.

Just east of that, a flash flood warning was in effect for areas that include DeKalb, northern Warren, White, Putnam, Cannon, Marshall, Lawrence, southeast Rutherford, Giles, Bedford and Coffee counties through 1:45 p.m.

Spectators watch as Old Hickory Dam releases water at a rate of 97,000 cubic feet per second which sends a whirl of water downstream toward Nashville Sunday, Feb. 24, 2019, in Nashville, Tenn. Larry McCormack / The Tennessean

A fisherman takes advantage of a sunny day at Old Hickory Dam as they release water at a rate of 97,000 cubic feet per second which sends a whirl of water downstream toward Nashville Sunday, Feb. 24, 2019, in Nashville, Tenn. Larry McCormack / The Tennessean

Old Hickory Dam releases water at a rate of 97,000 cubic feet per second which sends a whirl of water downstream toward Nashville Sunday, Feb. 24, 2019, in Nashville, Tenn. Larry McCormack / The Tennessean

Fergie, left and Rex right, wait for their owner Valerie Mejia to tosses a tennis ball for them to fetch into a flooded field at the Murfreesboro, Dog Park along Old Nashville Hwy., on Sunday, February 24, 2019. HELEN COMER/DNJ

Kathy Pecylak and Steve Pecylak take pictures of the Cumberland River in Nashville on Sunday, Feb. 24, 2019. The Pecylak's said they were visiting from Palm Harbor, Fl. and wanted to see the height of the river one last time before flying home later today. Mike Clark / For The Tennessean

Shay Deason, the Regional Operations Engineer for TDOT walks to his truck after looking at a landslide that blocks the eastbound lanes of I-24 near Whites Creek on Sunday, Feb. 24, 2019. Mike Clark / For The Tennessean

Carlos Rios, left, and Scott Hatcher look at the height of the Cumberland River in Nashville on Sunday, Feb. 24, 2019. Hatcher said he was watching the height of the river because his business, Equipment Finders Inc., flooded in 2010. He said his business would be ok if the river stayed below 50 feet. Mike Clark / For The Tennessean

The scene at the Grand Old RV Resort in Goodlettsville Sunday, Feb. 24, 2019, after days of rain hit Middle Tennessee. The RV park flooded Saturday forcing some evacuations. Adam Tamburin / The Tennessean

Columbia Police go door-to-door to 150 homes in the Riverside community near downtown Columbia evacuating residents Saturday, Feb. 23, 2019. The evacuation was not mandatory while officials are monitoring the Duck River. Shelley Mays / The Tennessean

The American Red Cross opened a disaster shelter at McGavock High School on McGavock Pike Saturday as the region remained under a flash flood warning. Residents from the Pennington Bend/Opryland area were encouraged to keep a close watch on neighborhood conditions and consider leaving the area. Andy Humbles / The Tennessean

Stacey Pearce brought two children from the River Glen neighborhood to a Red Cross shelter at McGavock High School because of flood concerns Saturday night, Feb. 23, 2019. Andy Humbles / The Tennessean

Katja Hedding, left, and Teresa Garrison, right move sand bags in a line to place around a neighbor's home to keep it safe from flood waters on Steelson Way in Murfreesboro, on Saturday, Feb. 23, 2019. HELEN COMER/DNJ

Jack Gilbert is helped across heavy water at the dock to dry land at Four Corners Marina in Nashville Saturday, Feb. 23, 2019, after days of rain have hit Middle Tennessee. George Walker IV / The Tennessean

Yellow tape blocks the entrance to the parking lot of the Brentwood Family YCA on Concord Road in Brentwood Wednesday, Feb. 20, 2019, after days of rain have hit Middle Tennessee. Shelley Mays / The Tennessean

Storm clouds appear over the stop sign at the corner of Port Royal Road and Sale Road, near the Clarksville Soccer Complex in Montgomery County on Wednesday, Feb. 20, 2019. Mike Clark / For The Leaf-Chronicle

The whole Middle Tennessee region is under a flash flood watch through through late Wednesday night and includes Davidson, Montgomery, Williamson, and Rutherford counties.

Forecasters say street flooding will be a hazard for travelers, low-lying and poor drainage areas will be at risk for flash flooding as well as creeks and streams.

With the ongoing rain & flooding, think about this: if you make the decision to drive through flooded roadways, not only are you putting yourself at risk, you're also putting somebody else's life at risk - the First Responder who has to rescue you. Turn Around. Don't Drown. pic.twitter.com/WGOFITyMGN

School closures in Middle Tennessee

Nashville schools remained open Wednesday, but canceled all after-school related activities, according to the district.

Cancellations include athletic events and practices. YMCA Fun Co. and extended learning fee-based programs will close at 4 p.m., the district stated.

Williamson County Schools announced it would dismiss an hour early due to reports of flooding in the area, School Age Child Care sites in Williamson County will remain open.

About 10:30 a.m., Rutherford County Schools announced it was dismissing two hours early due to flooding.

Wilson County Schools felt it was safer to keep students in school after consulting with the Wilson County Emergency Management Agency and National Weather Service, but would continue to monitor roads and the forecast, an official said.

Nashville area traffic conditions

Emergency crews are reporting several road closures across the Midstate.

A number of Nashville road closures Wednesday morning include Nolensville Pike at Culbertson Road, Nolensville Pike at Bluff Road, Granada Avenue at Apex Street, Glenrose Avenue at Old Glenrose Avenue and Newsom Station Road at Marymount Drive, according to Nashville Fire Department spokesman Joseph Pleasant.

In Rutherford County, where Vaught Road, Cripple Creek, and Kedron Church Road were impassable due to high water, firefighters are monitoring the weather as the rain rolls in. Department spokeswoman Lisa Sloan asked residents to be smart if they come across pooling water.

In Murfreesboro, the city planned to activate the Emergency Operations Center at the Murfreesboro Police Department headquarters, beginning at 9:30 a.m.

In Clarksville, localized flooding was already impacting roads in the city and county early Wednesday morning.

A white board at Montgomery County Emergency Management shows areas with flooding that motorists should avoid as of 5 a.m. Wednesday(Photo: CPD)

The Williamson County Emergency Management Agency said 25 roads were impacted by the heavy rain.

Chestnut Street and Maple street in Franklin were closed due to flooding.

The Williamson EMA also said Mill Creek is at flood stage in Nolensville. The water has risen to 13.22 feet. The Harpeth River is currently at 18 feet.

And trailers near a creek at Timberline Campground in off Murfreesboro Road in Wilson County had to be evacuated and relocated to other areas because of flood concerns, according to emergency officials.

A Wilson County school bus with 54 students on board was involved in an accident on State Route 109 when a truck jack-knifed, according to the district. No injuries were reported with the Wilson County Emergency Management Agency. The bus had minor damage to the mirrors, according to the district.

Also in Wilson County, the sheriff's office asked people to avoid Bluebird Road due to rising water. Sue Warren Trail in Cedar Forest Park off Highway 231 South has approximately six feet of water, according to Wilson County Sheriff’s Office Lt. Scott Moore.

A picture of Bluebird Road in Wilson County Wednesday morning.(Photo: Wilson County Sheriff's Office)

Portions of Central Pike, including near Leeville Pike and Gladeville Road in Wilson County have also flooded and “we’re starting to see additional roads (become hazardous) minute by minute,” Moore said.

Please avoid the area of Bluebird Road. Water is continuing to rise not only in this location, but in many areas of the county. pic.twitter.com/Dm5gASb2vj

When will the rain stop?

Middle Tennessee may see a break from the rain Thursday with only a few showers returning in the late afternoon and high temperatures in the mid 50s.

More rain and the threat of flash flooding is expected Friday morning through Saturday night. The National Weather Service says an additional 1 to 4 inches of rain is possible across Middle Tennessee.

Combined with the recent rainfall and saturated ground, forecasters say it could lead to significant flooding across Middle Tennessee.

Forecasters are also watching some strong to potentially severe thunderstorms may affect part of the Midstate Saturday evening, damaging winds and flooding will be possible, forecasters say.

Nashville weather radar

Emily West, Stephanie Ingersoll and Mealand Ragland contributed to this report. This story is being provided free to all readers as a public service by The Tennessean. Please consider supporting local journalism by subscribing.